US2993230A - Melt-spinning system - Google Patents

Melt-spinning system Download PDF

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Publication number
US2993230A
US2993230A US732944A US73294458A US2993230A US 2993230 A US2993230 A US 2993230A US 732944 A US732944 A US 732944A US 73294458 A US73294458 A US 73294458A US 2993230 A US2993230 A US 2993230A
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US
United States
Prior art keywords
spinning
leakage
pump
melt
pumps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US732944A
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English (en)
Inventor
William V Henry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Akzona Inc
Original Assignee
American Enka Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL103665D priority Critical patent/NL103665C/xx
Priority to NL236016D priority patent/NL236016A/xx
Application filed by American Enka Corp filed Critical American Enka Corp
Priority to US732944A priority patent/US2993230A/en
Priority to BE575949A priority patent/BE575949A/nl
Priority to DEA31417A priority patent/DE1192780B/de
Priority to GB6610/59A priority patent/GB864211A/en
Priority to ES0247651A priority patent/ES247651A1/es
Application granted granted Critical
Publication of US2993230A publication Critical patent/US2993230A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head

Definitions

  • the present invention relates generally to the production of artificial yam by the melt-spinning process and more particularly to a system for controlling the leakage around pumps used to convey molten polymeric material from a supply reservoir to a spinning plate for extrusion.
  • polymeric chips are fed from a bunker or chip column to a heated grid where the material melts and gravitates to a supply reservoir.
  • the molten viscous material passes from the reservoir to a first or pressure pump, after which it is forced under pressure to a second pump.
  • This second pump meters out a predetermined amount of the molten polymer supplied thereto and feeds the same to a spinneret having a suitable opening or orifice therein for forming yarn from the polymer extruded therethrough.
  • the freshly-extruded yarn passes from the spinneret into a cooling zone, after which the same solidifies and may be collected in package form.
  • the pumps used in the manner described herein operate under pressure which is necessary in order for the extrusion function to be performed.
  • An inherent dis-advantage concomitant with use of these pumps is leakage of the material being pumped along the drive shaft to the outside of the pump housing, which leakage eventually passes along the outer surface of the spinning assembly into the spinning column therebelow and impairs the spinning operation.
  • An object of 1 the present invention is to provide a process and apparatus for overcoming the aforesaid disadvantages of known spinning pumps.
  • Another object of this invention is to provide a spinning system which will eliminate the necessity for periodic maintenance due to spinning pump leakage.
  • a further object of the present invention is to provide a process and apparatus for controlling the direction of leakage along the drive shaft of pumps used in the spinning of polymeric or othertype materials.
  • Still anotherobject of this invention is to provide a process and apparatus capable of isolating inherent leakage of spinning-pumps from the main body of spinning
  • An additional object oi -the present invention is to provide a process and apparatus for collecting inherent "ice leakage of spinning pumps at a point remote pump housing.
  • Another object of this invention is to provide an apparatus for collecting pump leakage indefinitely Without discontinuing operation of the pump.
  • a further object of the present invention is to provide a removable leakage collecting container which can be removed readily tfrom operative position and emptied or replaced in a matter of seconds.
  • Still another object of this invention is to provide a system for controlling the leakage of spinning pumps to which conversion is easily accomplished and for which maintenance is economical.
  • a still additional object of the present invention is to provide a system for controlling the leakage of spinning pumps which requires no substantial change in existing equipment and very few additional elements.
  • the present disclosure relates not to the prevention of pump leakage but to a system for controlling the direction of leakage along the pump drive shaft, for isolating this leakage from the solution being pumped, and for collecting the leakage at a point remote from the pumps.
  • Conventional gear-type spinning pumps (hereinafter used to designate both the pressure and the metering pumps) generally used in the grid-spinning of polymeric material are supplied by'the manufacturer with a longitudinal bore through the center of the pump drive shaft, this bore being provided for the purpose of equalizing axial thrust due to pressure build-up on opposite ends thereof.
  • the spinning system disclosed herein utilizes this bore for an entirely dilierent purpose, but does not destroy or affect in any way the original function.
  • the objects of this invention may be accomplished by providing leakage ports in the spinning blocks on which the spinning pumps are mounted, which ports extend from the innermost end of the longitudinally bored pump drive shafts, where they are aligned with the aforesaid bore, to and through a spinning plate positioned beneath the spinning blocks.
  • Pump leakage is forced by the high pressure action of the pump, from the pumping zone of the pump gears along the drive shaft toward the ends thereof, with that portion of the leakage along the drive or outermost end of the shaft being diverted into and entering and passing through the longitudinal bore to the leakage ports, and that portion of the leakage at the innermost end being diverteddirectly into these ports, after which the combined leakage is forced by the action of additional leakage through the spinning blocks and spinning plate into a suitable container positioned therebelow.
  • the container may be removed, emptied and/or replaced periodically.
  • FIGURE 1 is an. elevational view, partly in section, of one melt-spinning position embodying the leakage control concept mentioned above;
  • FIGURE 2 is a perspective view of a leakage collec tion tray suitable forfuse with the apparatus of FIG- URELI"
  • the single melt-spinning position indicated generally by reference numeral 10 in FIGURE 1 comprises a melting grid I1, an upper spinning block 12, a lower spinning block 13, a spinning plate 14, and a spinning column or blowbox 15 which is separated from the spinning plate by insulation material or insulator 16. All of these elements are positioned one with respect to the other in the manner shown by the drawings, and are bolted together by means not shown.
  • Polymer chips are fed from the bunker or chip column 17 (only partially shown) into heated grid 11 where they are melted and passed down into the polymer reservoir 18. All of the polymer passageways leading from this reservoir to the spinning plate are indicated by dotted lines.
  • a suitable passageway 20 interconnects the reservoir 18 with the inlet conduit of gear-type pressure pump 21; passageway 22 leads from the outlet conduit of pressure pump 21 to the inlet conduit of gear-type metering pump 23; and passageway 24 leads from the outlet conduit of the last-named pump into the spinning chamber of spinning plate 14, where the molten material is extruded through apertured spinneret 25 into the blowbox 15, from which the freshly extruded yarn is fed to a suitable take-up.
  • Main drive shafts 26, 27 impart rotation to pump drive shafts 28, 30, respectively, as well as to'the gears splined thereto, through the couplings shown, as indicated by the arrows. These couplings are rotatably supported within stationary hubs 29 which are bolted to the respective pump housings. Shafts 31, 32 generally are non-rotatively mounted within the housing of pumps 21, 23, respectively, and rotatably support the driven gears in each instance.
  • pressure pump 21 and metering pump 23 may be substantially identical.
  • Each comprises a front plate 33 through which inlet and outlet conduits pass and in which are journaled one end of each of the two pump shafts shown, a central plate 34 suitably bored to receive the pump gears, and a back plate 35 apertured to receive the opposite ends of the two shafts.
  • the interengaging faces of these plates are precision machined 1n order to seal off the gears when the pumps are bolted to the respective spinning blocks. All of the structure discussed up to this point is of conventional design and, except to the extent that it contributes to the overall combination claimed herein, forms no part of the present inventive concept.
  • the present system provides a leakage pathhavingless resistance to flow than the normal'path just described, as will now be explained.
  • a first substantially horizontal leakage port 38 is drilled or otherwise formed in spinning block 12.
  • a first substantially'vertical leakage port 40 also is formed in spinning block 12, this port connect- ;ing with the innermost endv ofport 38 and leading to the One or more of these cavities are provided in most spinning plates for the purpose of reducing weight of the same.
  • a second substantially horizontal port 43 is formed in spinning block 13 in such a manner as to extend between the innermost end of longitudinal bore 37 and the second vertical port 41. These ports are slightly larger than the longitudinal bores mentioned, so as to offer very little resistance to polymer'flow, may be formed by drilling or any other suitable means.
  • An outlet port 44 is formed in that normally closed or solid portion of spinning plate 14 which defines the bottom of cavity 42. This permits leakage polymer to flow from the'spinning pumps 21, 23 through the spinning blocks 12, 13, spinning plate 14, and into the space therebelow, which is surrounded by generally circular insulator 16 and the blowbox 15.
  • a leakage collection tray 45 is slidably positioned within a suitable elongated opening 46 which is formed in the insulator 16 and which extends transversely of the spinning plate 14. For a more detailed description of this tray, attention is directed to FIGURE 2.
  • the tray 45 comprises an elongated main vcollection trough 47 and a box-like storage compartment 48 formed integral therewith and having greater depth and capacity than the trough.
  • a tray rake 50 is movably mounted within the trough 47 and may be operated through guide rods 51 secured thereto and extending longitudinally along the tray adjacent and parallel to the .side walls 52, 53.
  • the tray may be removed by pulling the same outwardly from the opening. 46 in insulator 16, after which-it may be dumped or replaced with an empty tray of comparable size.
  • the following chart indicates that other properties of the yarn were substantially the same as had been obtained before, the first line representing yarn produced on a modified machine and the second pertaining to yarn produced on a conventional assembly.
  • the leakage collection tray shown in FIGURE 2 normally' operates for about 48 hours before emptying is required. It is generally necessary, however, to rake leakage polymer from the trough into the storage compartment approximately every six hours. It is again pointed out, however, that neither operation requires interruption of the spinning process.
  • a leakage control process for use in the melt spinning of polymeric material utilizing a spinning pump having a longitudinally bored, rotatable, drive shaft comprising the steps of supplying molten polymeric material to said pump, pumping said material through an outlet of said pump to an extrusion zone and thereby accumulating polymer leakage around said drive shaft, diverting at least a portion of said leakage through said longitudinal bore to a point within the spinning assembly but isolated from the supply and outlet of said pump, and collecting the diverted leakage without disturbing the spinning operation and while maintaining the same isolated from the molten polymeric material passing to said extrusion zone.
  • a melt spinning system comprising a spinning block, a gear-type spinning pump secured to said spinning block and having a longitudinally bored, rotatable, drive shaft,
  • means for supplying polymeric spinn ng material to said pump means for receiving said spinning material from said pump and for extruding the same into yarn, means defining a leakage control port within said spinning block extending from one end of said drive shaft'and interconnecting said longitudinal bore with a point isolated from said spinning pump, means for diverting melt leakage from along said shaft into said longitudinal bore, and removable means for collecting leakage diverted'through said longitudinal bore and said leakage control port while maintaining said diverted leakage isolated from the spinning material supplied to said pump.
  • a melt spinning system having a spinning block, a spinning plate secured to one surface of said spinning block, a spinning pump secured to another surface of said spinning block, said spinning pump having a longitudinally bored, rotatable, drive shaft, means for supplying molten polymeric material to said spinning pump, and means supported by said spinning plate for receiving said material from said pump and for extruding the same into yarn, the improvement comprising means defining a leakage control port within said spinning block isolated from and extending from one end of said longitudinally bored drive shaft to and through said spinning plate, means for diverting melt leakage from along said shaft into said longitudinal bore, and means for collecting leakage diverted through said port while maintaining the same isolated from the molten polymeric material supplied to said pump.
  • a melt spinning system having a spinning block, a spinning plate secured to one surface of said spinning block, a pressure pump secured to another surface of said spinning block, at least one metering pump secured to still another surface of said spinning block, each'of said pumps having a longitudinally bored, rotatable, drive shaft, means for supplying molten polymeric material to said pressure pump, conduit means connecting said pressure pump with said metering pump whereby the outlet from the former will be fed to the latter, and means supported by said spinning plate for receiving material from the metering pump and for extruding the same into yarn, the improvement comprising means defining a substantially horizontal leakage control port extending fiom the bored shaft of each pump to a point within said spinning block isolated from said supply and extruding means, 'means for diverting melt leakage from along the pump shafts into the longitudinal bores thereof and to the horizontal leakage control port corresponding therewith, means defining a substantially vertical leakage port within said spinning block communicating with said horizontal ports and extending to and through said spinning plate, and
  • Leakage control means for use in the melt spinning of polymeric material utilizing a spinning pump having a longitudinally bored, rotatable, drive shaft, comprising means for supplying molten polymeric material to said pump, means for pumping said material through an outlet of said pump, thereby accumulating polymer leakage around said drive shaft, and for extruding the material into yarn, means for diverting said leakage through said longitudinal bore to a point within the spinning assembly but isolated from the supply and outlet of said pump, and means for collecting the diverted leakage without disturbing the spinning operation and while maintaining the same isolated from said supply of molten polymeric material and from said extruded yarn.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US732944A 1958-05-05 1958-05-05 Melt-spinning system Expired - Lifetime US2993230A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL103665D NL103665C (fi) 1958-05-05
NL236016D NL236016A (fi) 1958-05-05
US732944A US2993230A (en) 1958-05-05 1958-05-05 Melt-spinning system
BE575949A BE575949A (nl) 1958-05-05 1959-02-20 Inrichting tot het vervaardigen van kunstmatige draden volgens de smeltspinmethode, benevens de hiermede verkregen produkten
DEA31417A DE1192780B (de) 1958-05-05 1959-02-23 Schmelzspinnvorrichtung zur Herstellung von kuenstlichen Faeden
GB6610/59A GB864211A (en) 1958-05-05 1959-02-25 Improvements in apparatus for the production of artificial threads, fibres and like products by the melt-spinning process, and the products thus obtained
ES0247651A ES247651A1 (es) 1958-05-05 1959-03-02 Un aparato para la produccion de hilos, fibras y productos artificiales similares

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US732944A US2993230A (en) 1958-05-05 1958-05-05 Melt-spinning system

Publications (1)

Publication Number Publication Date
US2993230A true US2993230A (en) 1961-07-25

Family

ID=24945556

Family Applications (1)

Application Number Title Priority Date Filing Date
US732944A Expired - Lifetime US2993230A (en) 1958-05-05 1958-05-05 Melt-spinning system

Country Status (6)

Country Link
US (1) US2993230A (fi)
BE (1) BE575949A (fi)
DE (1) DE1192780B (fi)
ES (1) ES247651A1 (fi)
GB (1) GB864211A (fi)
NL (2) NL103665C (fi)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189670A1 (en) * 1985-01-05 1986-08-06 Maag Pump Systems AG Gear pumps
US5102323A (en) * 1988-08-31 1992-04-07 American National Can Company Plastic resin multi-layer co-extrusion extruder with multi-port plug for selecting order of layers
US5527178A (en) * 1993-05-24 1996-06-18 Courtaulds Fibres (Holdings) Limited Jet assembly

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252684A (en) * 1938-08-09 1941-08-19 Du Pont Apparatus for the production of artificial structures
US2278875A (en) * 1938-08-09 1942-04-07 Du Pont Method and apparatus for the production of artificial structures
US2369506A (en) * 1941-11-15 1945-02-13 Irvington Varnish & Insulator Producing filaments from molten organic compositions
US2420622A (en) * 1942-04-15 1947-05-13 Borg Warner Pump with pressure loaded bushing
US2432576A (en) * 1942-11-25 1947-12-16 Gen Motors Corp Gear pump for aeronautical apparatus
US2571377A (en) * 1947-05-15 1951-10-16 Prec Developments Co Ltd Rotary displacement pump
US2715753A (en) * 1954-05-10 1955-08-23 Ind Rayon Corp Multiple end spinning and twisting apparatus
US2781730A (en) * 1952-10-22 1957-02-19 Thompson Prod Inc Implement pump
US2791374A (en) * 1955-07-22 1957-05-07 Lingg Thomas Russell Waste handling device
US2792171A (en) * 1956-06-28 1957-05-14 Peter J Rosset Garbage disposal assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB292134A (en) * 1927-06-14 1928-09-13 Emil Eisermann Pump for feeding spinning solution (viscose or the like) for machines for manufacturing artificial thread
FR691843A (fr) * 1930-03-13 1930-10-27 Pompe à engrenages perfectionnée, pour filature des filaments artificiels
NL54547C (fi) * 1939-12-12 1943-05-15
DE1763501U (de) * 1958-01-25 1958-03-20 Phrix Werke Ag Vorrichtung zum kontinuierlichen verspinnen von organischen hochpolymeren.

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252684A (en) * 1938-08-09 1941-08-19 Du Pont Apparatus for the production of artificial structures
US2278875A (en) * 1938-08-09 1942-04-07 Du Pont Method and apparatus for the production of artificial structures
US2369506A (en) * 1941-11-15 1945-02-13 Irvington Varnish & Insulator Producing filaments from molten organic compositions
US2420622A (en) * 1942-04-15 1947-05-13 Borg Warner Pump with pressure loaded bushing
US2432576A (en) * 1942-11-25 1947-12-16 Gen Motors Corp Gear pump for aeronautical apparatus
US2571377A (en) * 1947-05-15 1951-10-16 Prec Developments Co Ltd Rotary displacement pump
US2781730A (en) * 1952-10-22 1957-02-19 Thompson Prod Inc Implement pump
US2715753A (en) * 1954-05-10 1955-08-23 Ind Rayon Corp Multiple end spinning and twisting apparatus
US2791374A (en) * 1955-07-22 1957-05-07 Lingg Thomas Russell Waste handling device
US2792171A (en) * 1956-06-28 1957-05-14 Peter J Rosset Garbage disposal assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189670A1 (en) * 1985-01-05 1986-08-06 Maag Pump Systems AG Gear pumps
US5102323A (en) * 1988-08-31 1992-04-07 American National Can Company Plastic resin multi-layer co-extrusion extruder with multi-port plug for selecting order of layers
US5527178A (en) * 1993-05-24 1996-06-18 Courtaulds Fibres (Holdings) Limited Jet assembly

Also Published As

Publication number Publication date
BE575949A (nl) 1959-06-15
ES247651A1 (es) 1959-06-16
NL236016A (fi)
GB864211A (en) 1961-03-29
DE1192780B (de) 1965-05-13
NL103665C (fi)

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